Solve each system by elimination. someone

You are remodeling your kitchen. you’ve contacted two tiling companies who gladly told you how long it took their workers to tile of a similar size jim completed half the floor in 8 hours. pete completed half of the other floor in 7 hours. if pete can lay 20 more tiles per hour than jim, at what rate can jim lay tiles

On the first of each month sasha runs a 5k race she keeps track of her times to track her progress her time in minutes is recorded in the table

What is 10+10+20 about the origin the square root of a triangle.